diff --git a/zaqar/notification/notifier.py b/zaqar/notification/notifier.py
index e27447cd9..f269394c4 100644
--- a/zaqar/notification/notifier.py
+++ b/zaqar/notification/notifier.py
@@ -63,8 +63,9 @@ class NotifierDriver(object):
                 for m in messages:
                     wh_flow.add(self._generate_task(s['subscriber'], m))
 
-            e = engines.load(wh_flow, executor=self.executor,
-                             engine='parallel')
-            e.run()
+            if wh_flow:
+                e = engines.load(wh_flow, executor=self.executor,
+                                 engine='parallel')
+                e.run()
         else:
             LOG.error('Failed to get subscription controller.')
diff --git a/zaqar/tests/unit/notification/test_notifier.py b/zaqar/tests/unit/notification/test_notifier.py
index d5aa74b9d..070b404a4 100644
--- a/zaqar/tests/unit/notification/test_notifier.py
+++ b/zaqar/tests/unit/notification/test_notifier.py
@@ -78,3 +78,12 @@ class NotifierTest(testing.TestBase):
         subscriber = self.subscription[0]['subscriber']
         new_task = self.driver._generate_task(subscriber, self.messages)
         self.assertIsInstance(new_task, task.webhook.WebhookTask)
+
+    def test_post_no_subscriber(self):
+        ctlr = mock.MagicMock()
+        ctlr.list = mock.Mock(return_value=iter([[]]))
+        driver = notifier.NotifierDriver(subscription_controller=ctlr)
+        with mock.patch('requests.post') as mock_post:
+            driver.post('fake_queue', self.messages, self.client_id,
+                        self.project)
+            self.assertEqual(0, mock_post.call_count)